If the selector lever will not move from P using the proper shift procedure, continue to hold down the brake pedal.

Take the vehicle to an Authorized Mazda Dealer to have the system checked.
Shift-Lock System
Manual Shift ModeM Position Switch Inspection [Fw6 A EL]
Continuity Inspection
NOTE:
The M position switch is built into the selector lever component.
1. Remove the battery cover..
2. Disconnect the negative battery cable..
3. Remove the console..
4. Disconnect the selector lever component connector.
5. Verify that the continuit ...
PKSB (Parking Support Brake)
The Subaru Solterra PKSB (Parking Support Brake) system is engineered
to assist the driver during low-speed maneuvers, such as parking, by issuing warnings
and automatically applying braking force to help reduce potential collision damage
with detected obstacles.
PKSB (Parking Support Brake) ...
Viewing the Display
Guide lines which indicate the width of the vehicle (yellow) are displayed on
the screen as a
reference to the approximate width of the vehicle in comparison to the width of
the parking
space you are about to back into.
Use this display view for parking your vehicle in a parking space or ga ...